Route · SEA → EWR · 2020–2025 BTS data
Seattle to Newark
The SEA–EWR corridor (Seattle, WA → Newark, NJ) runs ahead of the national average, served by 4 carriers across roughly 2,402 miles.
Data updated 2026-06-13
- 79.8%
- On-time
- +0.8 pts
- vs US avg
- 70 min
- Delay when late
- 10,549
- Flights
Cancelled
1.7%
Best Month
Oct 2024 90%
Worst Month
May 2025 53%
Distance
2,402 mi
Carriers
4
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 179 | 35 | 1 | 0 | AS,UA |
| Nov 2025 | 171 | 26 | 9 | 3 | UA,AS |
| Oct 2025 | 206 | 38 | 3 | 0 | AS,UA |
| Sep 2025 | 227 | 29 | 0 | 0 | UA,AS |
| Aug 2025 | 229 | 67 | 2 | 0 | UA,AS |
| Jul 2025 | 217 | 81 | 7 | 4 | AS,UA |
| Jun 2025 | 170 | 49 | 1 | 0 | AS,UA |
| May 2025 | 134 | 63 | 2 | 0 | AS,UA |
| Apr 2025 | 127 | 29 | 0 | 2 | UA,AS |
| Mar 2025 | 129 | 19 | 0 | 1 | AS,UA |
| Feb 2025 | 102 | 16 | 0 | 0 | AS,UA |
| Jan 2025 | 116 | 16 | 0 | 1 | AS,UA |
| Dec 2024 | 143 | 24 | 1 | 0 | AS,UA |
| Nov 2024 | 142 | 27 | 0 | 0 | UA,AS |
| Oct 2024 | 177 | 17 | 1 | 2 | UA,AS |
| Sep 2024 | 205 | 40 | 0 | 1 | UA,AS |
| Aug 2024 | 215 | 50 | 11 | 3 | AS,UA |
| Jul 2024 | 216 | 66 | 6 | 1 | AS,UA |
| Jun 2024 | 210 | 50 | 2 | 1 | AS,UA |
| May 2024 | 194 | 54 | 0 | 0 | AS,UA |
| Apr 2024 | 143 | 33 | 1 | 2 | AS,UA |
| Mar 2024 | 134 | 16 | 1 | 0 | AS,UA |
| Feb 2024 | 116 | 18 | 1 | 0 | AS,UA |
| Jan 2024 | 129 | 24 | 18 | 0 | AS,UA |
Cancellation Rate
1.7%
67 of 4,031 flights
Diversion Rate
0.5%
21 of 4,031 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
SEA - Seattle
Full on-time, delay-cause, and seasonal performance for Seattle, WA.
Origin airport →EWR - Newark
Full on-time, delay-cause, and seasonal performance for Newark, NJ.
Destination airport →Compare the two airports
See SEA and EWR side by side on delays, cancellations, and reliability.
Open comparison tool →Similar routes
Other BTS-tracked routes with comparable performance or trip length to SEA–EWR.
Routes with a similar on-time rate
What the Data Says About SEA to EWR
10,549 tracked flights put the SEA to EWR pairing (Seattle to Newark) at a 79.8% on-time rate, squarely in line with the wider network. Delays that do occur run 69.7 minutes on average. Across the 2,402-mile route and its 4 carriers, the trailing 24 months show 1.7% cancelled and 0.5% diverted (4,031 flights sampled).
The monthly split is wide on this route: Oct 2024 posted the strongest performance at 90% on-time, while May 2025 came in at just 53% - a 37-point swing worth factoring into travel timing.
Frequently Asked Questions
How often are flights delayed from SEA to EWR? ▼
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Flight Guides
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Data source
Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.
Read our methodology - how this data is sourced, computed, and verified.
Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.